New fbstream that syncs to the vsync signal

Generally improved video performance. Clears up the flickering. Lower
encoder CPU usage.

Change-Id: I276d52b3da41a8afa6b23c460c28ec0b6c9d5b64
Updates for input server / fbstream merge

* remove STUN server stuff from the build-svmp.sh script
* disable starting fbstream and webrtchelper in init.rc
* remove fbstream binary and start script

Change-Id: Id66f95eb753ad362a67cd82af50242d0228cd084
Allow event server to read /dev/fb0

Set's the device to world readable. This is an adequate solution for
now but should really do be replaced with something more secure using
groups and permissions.

Change-Id: I40cefeacee28292d14486ff432850076a42d2533
Split build script to workaround repo issue

The repo tool's copy directive that is used to copy the build script
from device/mitre/svmp into the AOSP root does not seem to always pick
up changes to the build script and copy the new version into root. Fix
by making build-svmp.sh a wrapper that calls the real script directly
from the device tree directory so it's always in sync. The wrapper will
never need to change.

Change-Id: Id4a381bb613fc26be1d16f9dd7e42b0cc71bf03b